Re: Crypto suggestion - re: Fatal Flaws in Credit Cards

Nathaniel's written about the "fatal flaw" in any system that involves typing credit card numbers into your computer being that they're easy for a keyboard-sniffer or similar cracker to recognize. An obvious work-around for this (and for many of the problems with Social Security / Taxpayer ID numbers) is to use some sort of smartcard that generates one-shot numbers that the credit card company (or tax thugs) can map back to the "real" owner's ID.

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Any other suggestions?

Isn't this what zero-knowledge proofs are for? Prove you know the credit card number without ever having to transmit it.